Continuously variable speed-changing transmission mechanism of sheet laminating apparatus

Abstract

A continuously variable speed-changing transmission mechanism of a sheet laminating apparatus includes a control module, a speed changing module, a speed reducing module and a hot press roller module. The continuously variable speed-changing transmission mechanism can laminate a sheet article at a stepless variable speed.

1. A continuously variable speed-changing transmission mechanism of a sheet laminating apparatus for driving rotation of a hot press roller module of said sheet laminating apparatus at a variable rotating speed, said continuously variable speed -changing transmission mechanism comprising:
 a speed changing module comprising a friction wheel, a power input transmission wheel and a power output transmission wheel, wherein a first end of a rod set is connected to a middle portion of said friction wheel such that said friction wheel is vertically connected to said rod set, said power input transmission wheel and said power output transmission wheel are sheathed around a power transmission shaft and spaced from each other, said power input transmission wheel is fixedly connected to said power transmission shaft, said power output transmission wheel is pivotally connected to said power transmission shaft, said power input transmission wheel and said power output transmission wheel are conical wheels having respective smaller-area top circular surfaces and respective larger-area bottom circular surfaces, and said top circular surfaces of said power input transmission wheel and the power output transmission wheel face to each other such that both sides of said friction wheel are simultaneously sustained against conical sidewalls of said conical wheels, wherein said speed changing module further includes a second friction wheel, a first end of a second rod set is connected to a middle portion of said second friction wheel such that said second friction wheel is vertically connected to said second rod set, and both sides of said second friction wheel are simultaneously sustained against conical sidewalls of said conical wheels such that said second friction wheel is swung along a second arc-shaped trajectory; 
 a control module having a controlling source and connected to said rod set for driving said rod set and swinging said friction wheel along an arc-shaped trajectory, wherein a contact area between said friction wheel and said power input transmission wheel and said power output transmission wheel is changeable by adjusting a swing angle of said friction wheel, wherein said control module further includes: 
 a control shaft, a first end of said control shaft is connected to a second end of said rod set such that said control shaft is vertically connected to said rod set, and when said control shaft is driven by said controlling source, said friction wheel is swung along said arc-shaped trajectory with an axle center of said control shaft serving as a center point and the length of said rod set serving as a radius: 
 a sector element having a sectorial center, wherein said sectorial center is connected a second end of said control shaft such that said sector element is vertically connected to said control shaft; 
 an arc-shaped recess formed in said sector element and having a ratchet structure on an inner wall thereof; 
 a shift lever having a first end connected to said controlling source, wherein a connecting ratchet is formed on a second end of said shift lever and engaged with said ratchet structure of said arc-shaped recess, wherein when said shift lever is driven by said controlling source, said ratchet structure is driven by said connecting ratchet, so that said sector element is swung along said arc-shaped trajectory with respect to said axle center of said control shaft and said control shaft is synchronously rotated along said arc-shaped trajectory; 
 a second control shaft, wherein a first end of said second control shaft is connected to a second end of said second rod set such that said second control shaft is vertically connected to said second rod set; and 
 a second sector element having a second sectorial center, wherein said second sectorial center is connected a second end of said second control shaft such that said second sector element is vertically connected to said second control shaft, 
 wherein arc-shaped edges of said sector element and said second sector element have teeth structures engaged with each other, so that said sector element is swung along a second arc-shaped trajectory with respect to an axle center of said second control shaft, and said second friction wheel is swung along said second arc-shaped trajectory with said axle center of said second control shaft serving as a center point and the length of said second rod set serving as a radius; 
 a motor connected to said power transmission shaft for driving said power transmission shaft, wherein due to a friction force between said friction wheel and said power input transmission wheel that is fixedly connected to said power transmission shaft, said friction wheel is synchronously rotated with said power input transmission wheel, and due to a friction force between said friction wheel and said power output transmission wheel that is pivotally connected to said power transmission shaft, said power output transmission wheel is synchronously rotated with said friction wheel; and 
 a speed reducing module having both ends respectively connected to said hot press roller module and said power output transmission wheel, so that said hot press roller module is rotated at a rotating speed lower than said power output transmission wheel. 
 
     
     
       2. The continuously variable speed-changing transmission mechanism according to  claim 1  wherein said friction wheel is made of plastic material and having friction strips. 
     
     
       3. The continuously variable speed-changing transmission mechanism according to  claim 1  wherein an elastomeric element is disposed within said rod set for providing a normal force on said friction wheel, so that said friction wheel is elastically sustained against said conical sidewalls of said conical wheels. 
     
     
       4. The continuously variable speed-changing transmission mechanism according to  claim 1  wherein said power input transmission wheel and said power output transmission wheel are made of soft rubbery materials. 
     
     
       5. The continuously variable speed-changing transmission mechanism according to  claim 1  wherein said power output transmission wheel and said power input transmission wheel are rotated in opposite directions, said power input transmission wheel and said power output transmission wheel are rotated at the same rotating speed if the contact area between said friction wheel and said power input transmission wheel is equal to the contact area between said friction wheel and said power output transmission wheel, and said power input transmission wheel and said power output transmission wheel are rotated at different rotating speeds if the contact area between said friction wheel and said power input transmission wheel is different from the contact area between said friction wheel and said power output transmission wheel. 
     
     
       6. The continuously variable speed-changing transmission mechanism according to  claim 1  wherein said second friction wheel is made of plastic material and having friction strips. 
     
     
       7. The continuously variable speed-changing transmission mechanism according to  claim 1  wherein a second elastomeric element is disposed within said second rod set for providing a normal force on said second friction wheel, so that said second friction wheel is elastically sustained against said conical sidewalls of said conical wheels. 
     
     
       8. The continuously variable speed-changing transmission mechanism according to  claim 1  wherein said control module further includes a plate-type frame having a receptacle for accommodating said sector element swung along said arc-shaped trajectory and said second sector element swung along said second arc-shaped trajectory. 
     
     
       9. A continuously variable speed-changing transmission mechanism of a sheet laminating apparatus for driving rotation of a hot press roller module of said sheet laminating apparatus at a variable rotating speed, said continuously variable speed-changing transmission mechanism comprising:
 a speed changing module comprising a friction wheel, a power input transmission wheel and a power output transmission wheel, wherein a first end of a rod set is connected to a middle portion of said friction wheel such that said friction wheel is vertically connected to said rod set, said power input transmission wheel and said power output transmission wheel are sheathed around a power transmission shaft and spaced from each other, said power input transmission wheel is fixedly connected to said power transmission shaft, said power output transmission wheel is pivotally connected to said power transmission shaft, said power input transmission wheel and said power output transmission wheel are conical wheels having respective smaller-area top circular surfaces and respective larger-area bottom circular surfaces, and said top circular surfaces of said power input transmission wheel and the power output transmission wheel face to each other such that both sides of said friction wheel are simultaneously sustained against conical sidewalls of said conical wheels; 
 a control module having a controlling source and connected to said rod set for driving said rod set and swinging said friction wheel along an arc-shaped trajectory, wherein a contact area between said friction wheel and said power input transmission wheel and said power output transmission wheel is changeable by adjusting a swing angle of said friction wheel; 
 a motor connected to said power transmission shaft for driving said power transmission shaft, wherein due to a friction force between said friction wheel and said power input transmission wheel that is fixedly connected to said power transmission shaft, said friction wheel is synchronously rotated with said power input transmission wheel, and due to a friction force between said friction wheel and said power output transmission wheel that is pivotally connected to said power transmission shaft, said power output transmission wheel is synchronously rotated with said friction wheel; and 
 a speed reducing module having both ends respectively connected to said hot press roller module and said power output transmission wheel, so that said hot press roller module is rotated at a rotating speed lower than said power output transmission wheel, wherein said speed reducing module includes: 
 a power output gear connected to said bottom circular surface of said power output transmission wheel; 
 a hot press gear connected to said hot press roller module, wherein the tooth number of said hot press gear is greater than the tooth number of said power output gear; and 
 a combining gear set including a first-layered gear and a second-layered gear, which are synchronously rotated, wherein the tooth number of said first-layered gear is greater than the tooth number of said second-layered gear, said power output gear is engaged with said first-layered gear, and said second-layered gear is engaged with said hot press gear, wherein when said first-layered gear is driven by said power output gear to rotate, said second-layered gear and said hot press gear are synchronously rotated. 
 
     
     
       10. The continuously variable speed-changing transmission mechanism according to  claim 9  wherein said first-layered gear and said second-layered gear of said combining gear set are integrally formed. 
     
     
       11. The continuously variable speed-changing transmission mechanism according to  claim 9  wherein said hot press roller module includes:
 a first hot press roller having a first end connected to said connected to said hot press gear; 
 a first hot press transmission shaft sheathed by said hot press gear and said first hot press roller such that said first hot press transmission shaft is synchronously rotated with said hot press gear; 
 a first transmission gear connected to a second end of said first hot press roller, wherein said first hot press transmission shaft is sheathed by said first transmission gear such that said first transmission gear is synchronously rotated with said first hot press transmission shaft; 
 a second hot press roller parallel with the first hot press roller; 
 a second hot press transmission shaft sheathed by said second hot press roller; and 
 a second transmission gear connected to an end of said second hot press roller and sheathed around said second hot press transmission shaft such that said second transmission gear is synchronously rotated with said second hot press transmission shaft, wherein said second transmission gear is engaged with said first transmission gear such that said second hot press roller and said first hot press roller are rotated in opposite directions. 
 
     
     
       12. The continuously variable speed-changing transmission mechanism according to  claim 11  wherein said hot press roller module further includes:
 a hot press connecting gear engaged with said first transmission gear, so that said hot press connecting gear is synchronously rotated with said first transmission gear; 
 a third hot press roller parallel with said first hot press roller; 
 a third transmission gear connected to an end of said first hot press roller, wherein said third transmission gear is engaged with said hot press connecting gear such that said third transmission gear is synchronously rotated with said hot press connecting gear; 
 a third hot press transmission shaft sheathed by said third transmission gear and said third hot press roller such that said third hot press transmission shaft is synchronously rotated with said third transmission gear; 
 a fourth hot press roller parallel with said third hot press roller; 
 a fourth hot press transmission shaft sheathed by said fourth hot press roller; and 
 a fourth transmission gear connected to an end of said fourth hot press roller and sheathed around said fourth hot press transmission shaft such that said fourth transmission gear is synchronously rotated with said fourth hot press transmission shaft, wherein said fourth transmission gear is engaged with said third transmission gear such that said fourth hot press roller and said third hot press roller are rotated in opposite directions. 
 
     
     
       13. The continuously variable speed-changing transmission mechanism according to  claim 1  wherein a power gear is connected to said bottom circular surface of said power input transmission wheel and sheathed around said power transmission shaft such that said power transmission shaft is synchronously rotated with said power gear, wherein said power gear is disposed at a first side of a connecting gear and engaged with said connecting gear, a second power gear is disposed at a second side of said connecting gear and engaged with said connecting gear, and said second power gear is connected with said motor. 
     
     
       14. A continuously variable speed-changing transmission mechanism of a sheet laminating apparatus for driving rotation of a hot press roller module of said sheet laminating apparatus at a variable rotating speed, said continuously variable speed-changing transmission mechanism comprising:
 a first conical wheel and a second conical wheel sheathed around a rotating shaft and spaced from each other, wherein said first conical wheel is fixedly connected to said rotating shaft, said second conical wheel is pivotally connected to said rotating shaft, said first conical wheel and said second conical wheel have respective smaller-area top circular surfaces and respective larger-area bottom circular surfaces, and said top circular surfaces of said first conical wheel and said second conical wheel face to each other; 
 a first control shaft; 
 a first friction wheel, both sides of which are simultaneously sustained against conical sidewalls of said first conical wheel and said second conical wheel, so that said first friction wheel is synchronously rotated with said first conical wheel and said second conical wheel; 
 a first rod set having a first end connected to a middle portion of said first friction wheel and a second end connected to a first end of said first control shaft, so that said first rod set is vertically connected to said first friction wheel and said first control shaft; 
 a controlling source connected to said first control shaft for driving said first control shaft such that said first friction wheel is swung along a first arc-shaped trajectory with an axle center of said first control shaft serving as a center point and the length of said first rod set serving as a radius, wherein a contact area between said first friction wheel and said first and second conical wheels is changeable by adjusting a swing angle of said first friction wheel, so that a rotating speed difference between the rotating speed of said first conical wheel and the rotating speed of said second conical wheel is generated; and 
 a speed reducing module having both ends respectively connected to said hot press roller module and said second conical wheel, so that said hot press roller module is rotated at a rotating speed lower than said second conical wheel, wherein said speed reducing module includes: 
 a power output gear connected to said bottom circular surface of said second conical wheel: 
 a hot press gear connected to said hot press roller module, wherein the tooth number of said hot press gear is greater than the tooth number of said power output gear; and 
 a combining gear set including a first-layered gear and a second-layered gear, which are synchronously rotated, wherein the tooth number of said first-layered gear is greater than the tooth number of said second-layered gear, said power output gear is engaged with said first-layered gear, and said second-layered gear is engaged with said hot press gear, wherein when said first-layered gear is driven by said power output gear to rotate, said second-layered gear and said hot press gear are synchronously rotated. 
 
     
     
       15. The continuously variable speed-changing transmission mechanism according to  claim 14  wherein said rotating shaft is a power transmission shaft connected to a motor, wherein due to a friction force between said first friction wheel and said first conical wheel that is fixedly connected to said power transmission shaft, said first friction wheel is synchronously rotated with said first conical wheel, and due to a friction force between said first friction wheel and said second conical wheel that is pivotally connected to said power transmission shaft, said second conical wheel is synchronously rotated with said first friction wheel. 
     
     
       16. The continuously variable speed-changing transmission mechanism according to  claim 15  wherein a power gear is connected to said bottom circular surface of said first conical wheel and sheathed around said power transmission shaft such that said power transmission shaft is synchronously rotated with said power gear, wherein said power gear is disposed at a first side of a connecting gear and engaged with said connecting gear, a second power gear is disposed at a second side of said connecting gear and engaged with said connecting gear, and said second power gear is connected with said motor. 
     
     
       17. The continuously variable speed-changing transmission mechanism according to  claim 15  wherein said motor is operated at a high rotating speed. 
     
     
       18. The continuously variable speed-changing transmission mechanism according to  claim 14  wherein said first conical wheel and said second conical wheel are made of soft rubbery material. 
     
     
       19. The continuously variable speed-changing transmission mechanism according to  claim 14  wherein said first conical wheel and said second conical wheel are rotated in opposite directions, said first conical wheel and said second conical wheel are rotated at the same rotating speed if the contact area between said first friction wheel and said first conical wheel is equal to the contact area between said first friction wheel and said second conical wheel, and said first conical wheel and said second conical wheel are rotated at different rotating speeds if the contact area between said first friction wheel and said first conical wheel is different from the contact area between said first friction wheel and said second conical wheel. 
     
     
       20. The continuously variable speed-changing transmission mechanism according to  claim 14  wherein said first friction wheel is made of plastic material and having friction strips. 
     
     
       21. The continuously variable speed-changing transmission mechanism according to  claim 14  wherein a first elastomeric element is disposed within said first rod set for providing a normal force on said first friction wheel, so that said first friction wheel is elastically sustained against said conical sidewalls of said first and second conical wheels. 
     
     
       22. The continuously variable speed-changing transmission mechanism according to  claim 14  further comprising a second friction wheel, wherein a middle portion of said second friction wheel is connected to a second rod set such that said second friction wheel is vertically connected to said second rod set, and both sides of said second friction wheel are simultaneously sustained against said conical sidewalls of said first conical wheel and said second conical wheel, so that said second friction wheel is swung with respect to said first friction wheel along a second arc-shaped trajectory. 
     
     
       23. The continuously variable speed-changing transmission mechanism according to  claim 22  wherein said second friction wheel is made of plastic material and having friction strips. 
     
     
       24. The continuously variable speed-changing transmission mechanism according to  claim 22  wherein a second elastomeric element is disposed within said second rod set for providing a normal force on said second friction wheel, so that said second friction wheel is elastically sustained against said conical sidewalls of said first and second conical wheels. 
     
     
       25. The continuously variable speed-changing transmission mechanism according to  claim 22  further comprising:
 a first sector element having a first sectorial center, wherein said first sectorial center is connected a second end of said first control shaft such that said first sector element is vertically connected to said first control shaft; 
 an arc-shaped recess formed in said first sector element and having a ratchet structure on an inner wall thereof; and 
 a shift lever having a first end connected to said controlling source, wherein a connecting ratchet is formed on a second end of said shift lever and engaged with said ratchet structure of said arc-shaped recess, 
 wherein when said shift lever is driven by said controlling source, said ratchet structure is driven by said connecting ratchet, so that said first sector element is swung along said first arc-shaped trajectory with respect to said axle center of said first control shaft and said first control shaft is synchronously rotated along said first arc-shaped trajectory. 
 
     
     
       26. The continuously variable speed-changing transmission mechanism according to  claim 25  further comprising:
 a second control shaft, wherein a first end of said second control shaft is connected to a second end of said second rod set such that said second control shaft is vertically connected to said second rod set; and 
 a second sector element having a second sectorial center, wherein said second sectorial center is connected a second end of said second control shaft such that said second sector element is vertically connected to said second control shaft, 
 wherein arc-shaped edges of said sector element and said second sector element have teeth structures engaged with each other, so that said sector element is swung along a second arc-shaped trajectory with respect to an axle center of said second control shaft, and said second friction wheel is swung along said second arc-shaped trajectory with said axle center of said second control shaft serving as a center point and the length of said second rod set serving as a radius. 
 
     
     
       27. The continuously variable speed-changing transmission mechanism according to  claim 26  wherein said control module further includes a plate-type frame having a receptacle for accommodating said first sector element swung along said first arc-shaped trajectory and said second sector element swung along said second arc-shaped trajectory. 
     
     
       28. The continuously variable speed-changing transmission mechanism according to  claim 14  wherein said first-layered gear and said second-layered gear of said combining gear set are integrally formed. 
     
     
       29. The continuously variable speed-changing transmission mechanism according to  claim 14  wherein said hot press roller module includes:
 a first hot press roller having a first end connected to said connected to said hot press gear; 
 a first hot press transmission shaft sheathed by said hot press gear and said first hot press roller such that said first hot press transmission shaft is synchronously rotated with said hot press gear; 
 a first transmission gear connected to a second end of said first hot press roller, wherein said first hot press transmission shaft is sheathed by said first transmission gear such that said first transmission gear is synchronously rotated with said first hot press transmission shaft; 
 a second hot press roller parallel with the first hot press roller; 
 a second hot press transmission shaft sheathed by said second hot press roller; and 
 a second transmission gear connected to an end of said second hot press roller and sheathed around said second hot press transmission shaft such that said second transmission gear is synchronously rotated with said second hot press transmission shaft, wherein said second transmission gear is engaged with said first transmission gear such that said second hot press roller and said first hot press roller are rotated in opposite directions. 
 
     
     
       30. The continuously variable speed-changing transmission mechanism according to  claim 29  wherein said hot press roller module further includes:
 a hot press connecting gear engaged with said first transmission gear, so that said hot press connecting gear is synchronously rotated with said first transmission gear; 
 a third hot press roller parallel with said first hot press roller; 
 a third transmission gear connected to an end of said first hot press roller, wherein said third transmission gear is engaged with said hot press connecting gear such that said third transmission gear is synchronously rotated with said hot press connecting gear; 
 a third hot press transmission shaft sheathed by said third transmission gear and said third hot press roller such that said third hot press transmission shaft is synchronously rotated with said third transmission gear; 
 a fourth hot press roller parallel with said third hot press roller; 
 a fourth hot press transmission shaft sheathed by said fourth hot press roller; and 
 a fourth transmission gear connected to an end of said fourth hot press roller and sheathed around said fourth hot press transmission shaft such that said fourth transmission gear is synchronously rotated with said fourth hot press transmission shaft, wherein said fourth transmission gear is engaged with said third transmission gear such that said fourth hot press roller and said third hot press roller are rotated in opposite directions.